nav.m_nav {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 98;
    overflow: hidden;
    transform: translateY(-100%);
    width: 100%;
    height: 100vh;
    transition: all 800ms cubic-bezier(.8, 0, .33, 1);
    border-radius: 0 0 50% 50%;
}

nav.m_nav.nav-open {
    transform: translateY(0);
    border-radius: 0% 0% 0% 0%;
    background: rgba(0, 0, 0, .8);
}

.menu-btn {
    position: fixed;
    top: 0;
    right: 10px;
    padding: 5px;
    cursor: pointer;
    z-index: 99;
    color: #000;
}

.menu-btn .line {
    padding: 0;
    width: 30px;
    background: #000;
    height: 2px;
    margin: 5px 0;
    transition: all 700ms cubic-bezier(.9, 0, .33, 1);
}

.menu-btn .line.line--1 {
    width: 30px;
    transform: rotate(0) translateY(0);
}

.menu-btn .line.line--1.line-cross {
    width: 30px;
    transform: rotate(45deg) translateX(5px) translateY(5px);
     background: rgba(0,0,0,1);
}

.menu-btn .line.line--2 {
    width: 28px;
    transform: translateX(0);
}

.menu-btn .line.line--2.line-fade-out {
    width: 28px;
    transform: translate(30px);
    opacity: 0;
}

.menu-btn .line.line--3 {
    width: 28px;
    transform: rotate(0) translateY(0);
}

.menu-btn .line.line--3.line-cross {
    width: 30px;
    transform: rotate(-45deg) translateX(5px) translateY(-5px);
     background: rgba(0,0,0,1);
}


nav.m_nav .nav-links {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transform: translateY(0);
    opacity: 0;
    transition: all 900ms cubic-bezier(.9, 0, .33, 1);
}

nav.m_nav .nav-links ul {
    width: 100%;
}

nav.m_nav .nav-links.fade-in {
    opacity: 1;
    transform: translateY(0);
}

nav.m_nav .nav-links .link {
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    width: 96%;
    max-width: 400px;
    margin: 0 auto;
    display: block;
    padding: 10px 0;
    color: #fff;
    font-size: 2.0rem;
    transition: all 300ms cubic-bezier(.9, 0, .33, 1);
}

.m_nav_tel,
.m_nav_tel a {
    font-size: 2.0rem;
    color: #fff;
}

nav.m_nav .nav-links .link:hover,nav.m_nav .nav-links .link.active { background: #00A0D4;}